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[Bug target/34709] [4.3 regression]: revision 131342 miscompiled 481.wrf on Linux/Intel64



------- Comment #3 from hjl at lucon dot org  2008-01-08 18:01 -------
(In reply to comment #2)
> (In reply to comment #1)
> > No idea if Uros has access to spec, so maybe you can quote the snippet where
> > rsqrtss is used from the assembly of 481.wrf?
> 
> Unfortunatelly no... does this patch help:
> 
> Index: i386.c
> ===================================================================
> --- i386.c      (revision 131392)
> +++ i386.c      (working copy)
> @@ -21449,7 +21449,7 @@ static tree
>  ix86_builtin_reciprocal (unsigned int fn, bool md_fn,
>                          bool sqrt ATTRIBUTE_UNUSED)
>  {
> -  if (! (TARGET_SSE_MATH && !optimize_size
> +  if (! (TARGET_SSE_MATH && TARGET_RECIP && !optimize_size
>          && flag_finite_math_only && !flag_trapping_math
>          && flag_unsafe_math_optimizations))
>      return NULL_TREE;

It works.

> BTW: What happens if -mrecip is used to compile 481.wrf?

I will give it a try.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34709


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